This concept plane is called the AWWA Sky Whale and it's the brainchild of Spanish designer Oscar Viñals. Should it ever leave the ground, the three-floor aircraft would hold 755 passengers and be powered by four large hybrid engines.

The concept plane was designed with current and future technologies in mind, including micro-solar panels that could charge the engines, self-healing skin with adaptable opacity, active wings to reduce turbulence, and advanced alloys, ceramic and fiber composite materials.

Its engines could rotate up to 45 degrees in a vertical position to assist during take-off and landing, thus reducing the distance of the runway.

Viñals has even designed the plane such that it would break apart on an emergency landing to limit damage.

It will seat about 755 passengers across three levels or floors; the first class on top with "sky views" and "all conceivable luxuries for a trip in an airplane like this," business class in the middle, and tourist class at the bottom "with all the comfort and space to have a pleasant flight."